Re: [PATCH] staging: rtl8723bs: use list_for_each_safe in loops deleting iterated items

From: Guenter Roeck
Date: Mon Jun 07 2021 - 10:35:47 EST

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In reply to: Fabio Aiuto: "[PATCH] staging: rtl8723bs: use list_for_each_safe in loops deleting iterated items"
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On Mon, Jun 07, 2021 at 03:46:18PM +0200, Fabio Aiuto wrote:
> Fix some beautified loops over linked lists.
> Use list_for_each_safe on loops which could delete
> objects in the list.
>
> Fixes: b3cd518c5abd ("staging: rtl8723bs: Use list iterators and helpers")
> Suggested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> Tested-by: Fabio Aiuto <fabioaiuto83@xxxxxxxxx>
> Signed-off-by: Fabio Aiuto <fabioaiuto83@xxxxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

> ---
> drivers/staging/rtl8723bs/core/rtw_ap.c | 18 +++++++++---------
> drivers/staging/rtl8723bs/core/rtw_mlme.c | 4 ++--
> drivers/staging/rtl8723bs/core/rtw_mlme_ext.c | 4 ++--
> drivers/staging/rtl8723bs/core/rtw_sta_mgt.c | 4 ++--
> drivers/staging/rtl8723bs/core/rtw_xmit.c | 18 +++++++++---------
> drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c | 4 ++--
> .../staging/rtl8723bs/os_dep/ioctl_cfg80211.c | 4 ++--
> 7 files changed, 28 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c
> index 98b1bec67999..23bbdf084631 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_ap.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_ap.c
> @@ -174,7 +174,7 @@ u8 chk_sta_is_alive(struct sta_info *psta)
>
> void expire_timeout_chk(struct adapter *padapter)
> {
> - struct list_head *phead, *plist;
> + struct list_head *phead, *plist, *tmp;
> u8 updated = false;
> struct sta_info *psta = NULL;
> struct sta_priv *pstapriv = &padapter->stapriv;
> @@ -186,7 +186,7 @@ void expire_timeout_chk(struct adapter *padapter)
>
> phead = &pstapriv->auth_list;
> /* check auth_queue */
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> psta = list_entry(plist, struct sta_info, auth_list);
>
> if (psta->expire_to > 0) {
> @@ -211,7 +211,7 @@ void expire_timeout_chk(struct adapter *padapter)
>
> phead = &pstapriv->asoc_list;
> /* check asoc_queue */
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> psta = list_entry(plist, struct sta_info, asoc_list);
> if (chk_sta_is_alive(psta) || !psta->expire_to) {
> psta->expire_to = pstapriv->expire_to;
> @@ -1243,7 +1243,7 @@ int rtw_acl_add_sta(struct adapter *padapter, u8 *addr)
>
> void rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
> {
> - struct list_head *plist, *phead;
> + struct list_head *plist, *phead, *tmp;
> struct rtw_wlan_acl_node *paclnode;
> struct sta_priv *pstapriv = &padapter->stapriv;
> struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
> @@ -1253,7 +1253,7 @@ void rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
> spin_lock_bh(&(pacl_node_q->lock));
>
> phead = get_list_head(pacl_node_q);
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> paclnode = list_entry(plist, struct rtw_wlan_acl_node, list);
>
> if (
> @@ -1940,7 +1940,7 @@ u8 ap_free_sta(
>
> void rtw_sta_flush(struct adapter *padapter)
> {
> - struct list_head *phead, *plist;
> + struct list_head *phead, *plist, *tmp;
> struct sta_info *psta = NULL;
> struct sta_priv *pstapriv = &padapter->stapriv;
> struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
> @@ -1953,7 +1953,7 @@ void rtw_sta_flush(struct adapter *padapter)
> spin_lock_bh(&pstapriv->asoc_list_lock);
> phead = &pstapriv->asoc_list;
> /* free sta asoc_queue */
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> psta = list_entry(plist, struct sta_info, asoc_list);
>
> list_del_init(&psta->asoc_list);
> @@ -2132,7 +2132,7 @@ void start_ap_mode(struct adapter *padapter)
>
> void stop_ap_mode(struct adapter *padapter)
> {
> - struct list_head *phead, *plist;
> + struct list_head *phead, *plist, *tmp;
> struct rtw_wlan_acl_node *paclnode;
> struct sta_info *psta = NULL;
> struct sta_priv *pstapriv = &padapter->stapriv;
> @@ -2156,7 +2156,7 @@ void stop_ap_mode(struct adapter *padapter)
> /* for ACL */
> spin_lock_bh(&(pacl_node_q->lock));
> phead = get_list_head(pacl_node_q);
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> paclnode = list_entry(plist, struct rtw_wlan_acl_node, list);
>
> if (paclnode->valid) {
> diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
> index 7bd9e3a4f345..158f92d4d882 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
> @@ -260,7 +260,7 @@ struct wlan_network *_rtw_find_network(struct __queue *scanned_queue, u8 *addr)
>
> void rtw_free_network_queue(struct adapter *padapter, u8 isfreeall)
> {
> - struct list_head *phead, *plist;
> + struct list_head *phead, *plist, *tmp;
> struct wlan_network *pnetwork;
> struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
> struct __queue *scanned_queue = &pmlmepriv->scanned_queue;
> @@ -268,7 +268,7 @@ void rtw_free_network_queue(struct adapter *padapter, u8 isfreeall)
> spin_lock_bh(&scanned_queue->lock);
>
> phead = get_list_head(scanned_queue);
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
>
> pnetwork = list_entry(plist, struct wlan_network, list);
>
> diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
> index 2b95a49ab469..0f50c2576356 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
> @@ -6058,7 +6058,7 @@ u8 h2c_msg_hdl(struct adapter *padapter, unsigned char *pbuf)
> u8 chk_bmc_sleepq_hdl(struct adapter *padapter, unsigned char *pbuf)
> {
> struct sta_info *psta_bmc;
> - struct list_head *xmitframe_plist, *xmitframe_phead;
> + struct list_head *xmitframe_plist, *xmitframe_phead, *tmp;
> struct xmit_frame *pxmitframe = NULL;
> struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
> struct sta_priv *pstapriv = &padapter->stapriv;
> @@ -6075,7 +6075,7 @@ u8 chk_bmc_sleepq_hdl(struct adapter *padapter, unsigned char *pbuf)
> spin_lock_bh(&pxmitpriv->lock);
>
> xmitframe_phead = get_list_head(&psta_bmc->sleep_q);
> - list_for_each(xmitframe_plist, xmitframe_phead) {
> + list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
> pxmitframe = list_entry(xmitframe_plist,
> struct xmit_frame, list);
>
> diff --git a/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c b/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c
> index fa164d25f4eb..67ca219f95bf 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c
> @@ -423,7 +423,7 @@ u32 rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
> /* free all stainfo which in sta_hash[all] */
> void rtw_free_all_stainfo(struct adapter *padapter)
> {
> - struct list_head *plist, *phead;
> + struct list_head *plist, *phead, *tmp;
> s32 index;
> struct sta_info *psta = NULL;
> struct sta_priv *pstapriv = &padapter->stapriv;
> @@ -436,7 +436,7 @@ void rtw_free_all_stainfo(struct adapter *padapter)
>
> for (index = 0; index < NUM_STA; index++) {
> phead = &(pstapriv->sta_hash[index]);
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> psta = list_entry(plist, struct sta_info, hash_list);
>
> if (pbcmc_stainfo != psta)
> diff --git a/drivers/staging/rtl8723bs/core/rtw_xmit.c b/drivers/staging/rtl8723bs/core/rtw_xmit.c
> index e37c4ba50d6d..0562fa6c1255 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_xmit.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_xmit.c
> @@ -1723,13 +1723,13 @@ s32 rtw_free_xmitframe(struct xmit_priv *pxmitpriv, struct xmit_frame *pxmitfram
>
> void rtw_free_xmitframe_queue(struct xmit_priv *pxmitpriv, struct __queue *pframequeue)
> {
> - struct list_head *plist, *phead;
> + struct list_head *plist, *phead, *tmp;
> struct xmit_frame *pxmitframe;
>
> spin_lock_bh(&pframequeue->lock);
>
> phead = get_list_head(pframequeue);
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> pxmitframe = list_entry(plist, struct xmit_frame, list);
>
> rtw_free_xmitframe(pxmitpriv, pxmitframe);
> @@ -2122,7 +2122,7 @@ signed int xmitframe_enqueue_for_sleeping_sta(struct adapter *padapter, struct x
> static void dequeue_xmitframes_to_sleeping_queue(struct adapter *padapter, struct sta_info *psta, struct __queue *pframequeue)
> {
> signed int ret;
> - struct list_head *plist, *phead;
> + struct list_head *plist, *phead, *tmp;
> u8 ac_index;
> struct tx_servq *ptxservq;
> struct pkt_attrib *pattrib;
> @@ -2130,7 +2130,7 @@ static void dequeue_xmitframes_to_sleeping_queue(struct adapter *padapter, struc
> struct hw_xmit *phwxmits = padapter->xmitpriv.hwxmits;
>
> phead = get_list_head(pframequeue);
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> pxmitframe = list_entry(plist, struct xmit_frame, list);
>
> pattrib = &pxmitframe->attrib;
> @@ -2191,7 +2191,7 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
> {
> u8 update_mask = 0, wmmps_ac = 0;
> struct sta_info *psta_bmc;
> - struct list_head *xmitframe_plist, *xmitframe_phead;
> + struct list_head *xmitframe_plist, *xmitframe_phead, *tmp;
> struct xmit_frame *pxmitframe = NULL;
> struct sta_priv *pstapriv = &padapter->stapriv;
> struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
> @@ -2201,7 +2201,7 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
> spin_lock_bh(&pxmitpriv->lock);
>
> xmitframe_phead = get_list_head(&psta->sleep_q);
> - list_for_each(xmitframe_plist, xmitframe_phead) {
> + list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
> pxmitframe = list_entry(xmitframe_plist, struct xmit_frame,
> list);
>
> @@ -2272,7 +2272,7 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
>
> if ((pstapriv->sta_dz_bitmap&0xfffe) == 0x0) { /* no any sta in ps mode */
> xmitframe_phead = get_list_head(&psta_bmc->sleep_q);
> - list_for_each(xmitframe_plist, xmitframe_phead) {
> + list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
> pxmitframe = list_entry(xmitframe_plist,
> struct xmit_frame, list);
>
> @@ -2308,7 +2308,7 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
> void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *psta)
> {
> u8 wmmps_ac = 0;
> - struct list_head *xmitframe_plist, *xmitframe_phead;
> + struct list_head *xmitframe_plist, *xmitframe_phead, *tmp;
> struct xmit_frame *pxmitframe = NULL;
> struct sta_priv *pstapriv = &padapter->stapriv;
> struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
> @@ -2316,7 +2316,7 @@ void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *pst
> spin_lock_bh(&pxmitpriv->lock);
>
> xmitframe_phead = get_list_head(&psta->sleep_q);
> - list_for_each(xmitframe_plist, xmitframe_phead) {
> + list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
> pxmitframe = list_entry(xmitframe_plist, struct xmit_frame,
> list);
>
> diff --git a/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c b/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c
> index ec9f275cbc7e..a05d43b716ee 100644
> --- a/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c
> +++ b/drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c
> @@ -178,7 +178,7 @@ static s32 xmit_xmitframes(struct adapter *padapter, struct xmit_priv *pxmitpriv
> struct hw_xmit *hwxmits, *phwxmit;
> u8 idx, hwentry;
> struct tx_servq *ptxservq;
> - struct list_head *sta_plist, *sta_phead, *frame_plist, *frame_phead;
> + struct list_head *sta_plist, *sta_phead, *frame_plist, *frame_phead, *tmp;
> struct xmit_frame *pxmitframe;
> struct __queue *pframe_queue;
> struct xmit_buf *pxmitbuf;
> @@ -225,7 +225,7 @@ static s32 xmit_xmitframes(struct adapter *padapter, struct xmit_priv *pxmitpriv
> sta_phead = get_list_head(phwxmit->sta_queue);
> /* because stop_sta_xmit may delete sta_plist at any time */
> /* so we should add lock here, or while loop can not exit */
> - list_for_each(sta_plist, sta_phead) {
> + list_for_each_safe(sta_plist, tmp, sta_phead) {
> ptxservq = list_entry(sta_plist, struct tx_servq,
> tx_pending);
>
> diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
> index 9a6e47877c4e..c10146428757 100644
> --- a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
> +++ b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
> @@ -2453,7 +2453,7 @@ static int cfg80211_rtw_del_station(struct wiphy *wiphy, struct net_device *ndev
> struct station_del_parameters *params)
> {
> int ret = 0;
> - struct list_head *phead, *plist;
> + struct list_head *phead, *plist, *tmp;
> u8 updated = false;
> struct sta_info *psta = NULL;
> struct adapter *padapter = rtw_netdev_priv(ndev);
> @@ -2483,7 +2483,7 @@ static int cfg80211_rtw_del_station(struct wiphy *wiphy, struct net_device *ndev
>
> phead = &pstapriv->asoc_list;
> /* check asoc_queue */
> - list_for_each(plist, phead) {
> + list_for_each_safe(plist, tmp, phead) {
> psta = list_entry(plist, struct sta_info, asoc_list);
>
> if (!memcmp((u8 *)mac, psta->hwaddr, ETH_ALEN)) {
> --
> 2.20.1
>

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In reply to: Fabio Aiuto: "[PATCH] staging: rtl8723bs: use list_for_each_safe in loops deleting iterated items"
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